harshavardhini33 / exo7-ai-chasing-ai-player

EXO7-AI-CHASING-AI-PLAYER

AIM:

To implement-chasing when AI see the player.

ALGORITHM:

STEP 1: Set up the AI character Blueprint:

• Create an AI character Blueprint (if you haven't already) following the steps mentioned earlier.
• Add a Sphere Collision component to the AI character Blueprint.
• Position and scale the Sphere Collision component to represent the AI's detection range.
• Set the Sphere Collision component's collision settings to overlap with the player character.

STEP 2: Create a new AI controller Blueprint:

• In the Content Browser, right-click in the desired folder.
• Select Create Basic Asset > Blueprint Class.
• Choose the AIController as the parent class.
• Name the Blueprint (e.g., "AIController_Chase") and click Create.

STEP 3: Open the AIController Blueprint:

• In the Blueprint editor, locate the Event Begin Play event.
• Drag off the execution line and search for "Set Sight Radius".
• Set the Sight Radius value to the desired range for the AI's vision.
• Drag off the execution line again and search for "Set Peripheral Vision Angle".
• Set the Peripheral Vision Angle value to the desired field of view for the AI's vision.

STEP 4: Implement perception for the AI:

• Drag off the execution line in the Begin Play event and search for "Create and Configure AI Perception Component".
• Connect the output of the AI Perception Component node to the AI Controller's AI Perception property.
• In the AI Perception Component node, configure the settings for sight and sight sense.
• Drag off the AI Perception Component node and search for "Update Perception".
• Connect the output of the Update Perception node to the Event Tick event.
• In the Update Perception node, select "Sight" as the stimulus to update.
• Connect the output of the AI Perception Component to a "For Each Loop" node to iterate through all perceived stimuli.

STEP 5: Implement the chase behavior:

• Inside the For Each Loop, check if the perceived stimulus is the player character.
• If the stimulus is the player character, drag off the execution line and search for "Move To Actor".
• Set the Move To Actor node's target to the player character.
• Connect the output of the Move To Actor node to the AI Controller's Move To Location input.

STEP 6: Create blackboard keys for the AI

• Open the AIController Blueprint.
• In the Blueprint editor, locate the Event Begin Play event.
• Drag off the execution line and search for "Create Blackboard".
• Create a new blackboard object and assign it to the AIController's Blackboard property.
• Drag off the execution line again and search for "Create Blackboard Key".
• Create a new key for the blackboard, such as "PlayerLocation".
• Connect the output of the Create Blackboard Key node to the AIController's Blackboard property

STEP 7: Update blackboard values:

• In the AIController Blueprint, find the Event Tick event.
• Drag off the execution line and search for "Get Player Character".
• Drag off the player character reference and search for "Get Actor Location".
• Connect the output of the Get Actor Location node to the AIController's Set Blackboard Value As Vector input.
• Set the Blackboard Key to the "PlayerLocation" key you created earlier

STEP 8: Set up the Behavior Tree:

• Create a Behavior Tree asset following the steps mentioned earlier.
• Open the Behavior Tree asset in the Behavior Tree editor.
• Drag and drop a "Blackboard Key Selector" node onto the graph.
• Configure the Blackboard Key Selector node to use the "PlayerLocation" key

OUTPUT:

Blackboard Key Creation:

Behaviour Tree:

Setting Player Key Sequence Node:

Setting Player Key to Move Node:

Setting Player Ley to BB Rotate Node:

Adding AI Perception Node:

AI Controller Graph:

AI Controller Class Selection:

AI Sense Configuration:

Game Mode:

RESULT:

Thus, the AI concept to the actor for chasing when AI sees the player.